Nonprofits in Wisconsin

Nonprofits in Wisconsin. Browse 46,682 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. Oasis Youth Center Inc

    EIN 271260524 · Headquarters: Kenosha, WI, US · Youth Development · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  2. Oasiz Inc

    EIN 850566556 · Headquarters: Kohler, WI, US · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Oberlanders Snowmobile Club Incorporated

    EIN 510180633 · Headquarters: Rubicon, WI, US · Recreation & Sports · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  4. Objective Veterans Smile

    EIN 843788139 · Headquarters: Madison, WI, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Obma Foundation Inc

    EIN 464263057 · Headquarters: GREEN BAY, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-PF

  6. Obp Boxing & Youth Mentoring Program Llc

    EIN 880866445 · Headquarters: Verona, WI, US · Recreation & Sports · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  7. Occ Mtb Corp

    EIN 825475931 · Headquarters: Cedarburg, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Occupaws Guide Dog Association

    EIN 205172386 · Headquarters: MADISON, WI, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  9. Occupy Madison Inc

    EIN 461581696 · Headquarters: Madison, WI, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Ocd-Wisconsin Foundation Inc

    EIN 462074424 · Headquarters: MONONA, WI, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Ocean Connections Inc

    EIN 830524624 · Headquarters: NASHOTAH, WI, USA · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990

  12. Oceanographic Pathways Institute Ltd

    EIN 814125169 · Headquarters: Appleton, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Ocono County Lakes and Waterways Association

    EIN 391964814 · Headquarters: TOWNSEND, WI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Oconomowoc American Legion Band

    EIN 300587977 · Headquarters: Oconomowoc, WI, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Oconomowoc Area Chamber of Commerce

    EIN 391127512 · Headquarters: Oconomowoc, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Oconomowoc Area Chamber of Commerce Foundation Inc

    EIN 202132285 · Headquarters: OCONOMOWOC, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Oconomowoc Area Foundation Inc

    EIN 753266194 · Headquarters: MILWAUKEE, WI, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Oconomowoc Area Rea

    EIN 271706136 · Headquarters: New Berlin, WI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  19. Oconomowoc Area Senior Center

    EIN 391631929 · Headquarters: Oconomowoc, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Oconomowoc Area Tennis Club

    EIN 391510186 · Headquarters: Oconomowoc, WI, US · Recreation & Sports · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  21. Oconomowoc Area Veterans Group Inc

    EIN 464341127 · Headquarters: Oconomowoc, WI, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Oconomowoc Cemetery Association

    EIN 390513260 · Headquarters: OCONOMOWOC, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Oconomowoc Chamber Orchestra

    EIN 264530447 · Headquarters: Oconomowoc, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Oconomowoc Community Choir Inc

    EIN 391870716 · Headquarters: Oconomowoc, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Oconomowoc Community Theatre

    EIN 922523642 · Headquarters: Oconomowoc, WI, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Oconomowoc Cooperative Nursery School Inc

    EIN 390928984 · Headquarters: OCONOMOWOC, WI, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  27. Oconomowoc Dental Anesthesia Center Inc

    EIN 821995772 · Headquarters: Oconomowoc, WI, US · Health Care · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  28. Oconomowoc Education Association

    EIN 237102137 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Oconomowoc Festival of the Arts Ltd

    EIN 391445102 · Headquarters: OCONOMOWOC, WI, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Oconomowoc Food Pantry Inc

    EIN 391480509 · Headquarters: Oconomowoc, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Oconomowoc Golf Club

    EIN 390513312 · Headquarters: OCONOMOWOC, WI, USA · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990

  32. Oconomowoc High School Band AIDS Inc

    EIN 205510350 · Headquarters: OCONOMOWOC, WI, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  33. Oconomowoc Historical Society

    EIN 391376661 · Headquarters: OCONOMOWOC, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Oconomowoc Junior Raccoons Volleyball

    EIN 851737133 · Headquarters: Oconomowoc, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Oconomowoc Junior Womans Club Inc

    EIN 753019510 · Headquarters: OCONOMOWOC, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Oconomowoc LaCrosse Club Inc

    EIN 461722856 · Headquarters: Summit, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Oconomowoc Lake Club

    EIN 390513325 · Headquarters: OCONOMOWOC, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Oconomowoc Memorial Hospital Auxiliary Inc

    EIN 396047514 · Headquarters: Oconomowoc, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Oconomowoc Memorial Hospital Foundation Inc

    EIN 391271647 · Headquarters: OCONOMOWOC, WI, USA · Health Care · Latest available filing year: 2011 · Primary form: IRS Form 990

  40. Oconomowoc Newcomers & Neighbors

    EIN 391686890 · Headquarters: Oconomowoc, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  41. Oconomowoc Parents for Baseball Inc

    EIN 391919866 · Headquarters: OCONOMOWOC, WI, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Oconomowoc Police Officers Association

    EIN 264698548 · Headquarters: Oconomowoc, WI, US · Crime & Legal Related · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  43. Oconomowoc Public Education Foundation Inc

    EIN 208858261 · Headquarters: OCONOMOWOC, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Oconomowoc Rotary Charitable Foundation Inc

    EIN 391498210 · Headquarters: Oconomowoc, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  45. Oconomowoc Rugby Football Club

    EIN 900060827 · Headquarters: Union Grove, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Oconomowoc Scholarship Fund

    EIN 396076192 · Headquarters: OCONOMOWOC, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Oconomowoc Silver Streak Inc

    EIN 391701930 · Headquarters: OCONOMOWOC, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Oconomowoc Soccer Association Inc

    EIN 391604828 · Headquarters: Delafield, WI, USA · Recreation & Sports · Latest available filing year: 2011 · Primary form: IRS Form 990

  49. Oconomowoc Softball Association Inc

    EIN 923376179 · Headquarters: Waukesha, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Oconomowoc Sports Booster Club Inc Dba Oconomowoc High School

    EIN 391340155 · Headquarters: OCONOMOWOC, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Oconomowoc Sportsmans Club

    EIN 391314541 · Headquarters: North Prairie, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. Oconomowoc Wrestling Booster Club

    EIN 853468907 · Headquarters: Oconomowoc, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Oconto Area Atv Club Inc

    EIN 272228756 · Headquarters: Oconto, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  54. Oconto Area Humane Society & Animal Shelter Inc

    EIN 300130083 · Headquarters: OCONTO, WI, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Oconto Area Non-profit Child Care

    EIN 391677345 · Headquarters: OCONTO, WI, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Oconto Copperfest Steering Committee Inc

    EIN 392034239 · Headquarters: Oconto, WI, US · Recreation & Sports · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  57. Oconto County Commission On Aging INC

    EIN 391346216 · Headquarters: Oconto, WI, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  58. Oconto County Economic Development Corporation

    EIN 391286973 · Headquarters: OCONTO, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Oconto County Fair and Exposition Inc

    EIN 391909134 · Headquarters: GILLETT, WI, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  60. Oconto County Farm Bureau Co-operative

    EIN 390824309 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Oconto County Genealogical Society Furing Chapter

    EIN 030528710 · Headquarters: Suring, WI, US · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  62. Oconto County Hce

    EIN 391279334 · Headquarters: Oconto, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Oconto County Historical Society

    EIN 396081208 · Headquarters: Oconto, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Oconto County Jail Outreach

    EIN 271058817 · Headquarters: SURING, WI, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Oconto County Medical Society

    EIN 391710027 · Headquarters: Oconto Falls, WI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  66. Oconto County Partnership Inc

    EIN 391691762 · Headquarters: Oconto, WI, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  67. Oconto County School Supply Drive Inc

    EIN 862918238 · Headquarters: Oconto, WI, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Oconto County Veterans Memorial

    EIN 843429947 · Headquarters: Oconto, WI, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Oconto County Youth Fair Inc

    EIN 396075882 · Headquarters: GILLETT, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. Oconto Electric Cooperative

    EIN 390513423 · Headquarters: OCONTO FALLS, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. Oconto Elks Lodge 887

    EIN 390975295 · Headquarters: OCONTO, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  72. Oconto Evergreen Cemetery Association

    EIN 390749454 · Headquarters: Oconto, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Oconto Falls Area Chamber of Commerce

    EIN 421765685 · Headquarters: OCONTO FALLS, WI, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  74. Oconto Falls Area Heritage Center Inc

    EIN 460614475 · Headquarters: OCONTO FALLS, WI, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Oconto Falls Area Joint Ambulance Service Inc

    EIN 391867539 · Headquarters: OCONTO FALLS, WI, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Oconto Falls Area Senior Citizens & Community Center

    EIN 391370744 · Headquarters: Oconto Falls, WI, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Oconto Falls Area Veterans Monument Inc

    EIN 862271916 · Headquarters: OCONTO FALLS, WI, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Oconto Falls Betterment Corporation Inc

    EIN 994965651 · Headquarters: Oconto Falls, WI, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Oconto Falls Cemetery Association

    EIN 391209543 · Headquarters: Oconto Falls, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Oconto Falls Community Garden Corp

    EIN 334351833 · Headquarters: Oconto Falls, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Oconto Falls Education Association

    EIN 237086066 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Oconto Falls Education Support Personnel

    EIN 391710772 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Oconto Falls Friends of the Arts Inc

    EIN 392042737 · Headquarters: Oconto Falls, WI, US · Arts, Culture & Humanities · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  84. Oconto Falls Golf Club Inc

    EIN 390991246 · Headquarters: OCONTO FALLS, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Oconto Falls Sportsmen Club Inc Stiles Wi 54172

    EIN 396076204 · Headquarters: Oconto Falls, WI, US · Recreation & Sports · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  86. Oconto Fire & Rescue Auxiliary Inc

    EIN 455175406 · Headquarters: OCONTO, WI, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Oconto Flying Club Inc

    EIN 391104171 · Headquarters: OCONTO, WI, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  88. Oconto Girls Softball Association

    EIN 391827539 · Headquarters: Oconto, WI, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Oconto Gun Club Inc Co Trunk S One Half Mi S

    EIN 396075883 · Headquarters: Oconto, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  90. Oconto Hospital and Medical Center

    EIN 061745397 · Headquarters: OCONTO, WI, USA · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990

  91. Oconto Kids First Pto

    EIN 391977090 · Headquarters: OCONTO, WI, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Oconto Literacy Charter School

    EIN 800403784 · Headquarters: OCONTO, WI, US · Education · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  93. Oconto Little League Inc

    EIN 391609402 · Headquarters: Oconto, WI, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Oconto Memorial Hospital Citizens Foundation Inc

    EIN 391900586 · Headquarters: OCONTO, WI, USA · Health Care · Latest available filing year: 2020 · Primary form: IRS Form 990

  95. Oconto Nonprofit Housing Inc

    EIN 237369493 · Headquarters: LA CROSSE, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Oconto Pre School Center Inc

    EIN 391157914 · Headquarters: Oconto, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Oconto River Kids Inc

    EIN 471438468 · Headquarters: Mountain, WI, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  98. Oconto Sportsmens Club Inc

    EIN 811191489 · Headquarters: Oconto, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Oconto Support Staff Association

    EIN 262691413 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Oconto Teachers Education Association

    EIN 237103118 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

First page and all pages